I've been in the field for about a week now and when we got back I tried starting my BJ70 and it turned over and wouldn't start. The volts are good and it was about 70 when I tried starting it. I jump it and it's fine or starting it after I've charged the batteries. Then this morning it's about 50 and it couldn't start. Is it a starter problem or could it be my glow plugs are not working? Imbstillntrying to learn this vehicle so any help would be appreciated. Thanks in advance.